The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2009
Filed:
Sep. 12, 2003
Klaus Tank, 2001 Johannesburg, ZA;
Raymond Albert Chapman, 2001 Johannesburg, ZA;
Roy Derrick Achilles, Bedfordview, 2007, ZA;
Klaus Tank, 2001 Johannesburg, ZA;
Raymond Albert Chapman, 2001 Johannesburg, ZA;
Roy Derrick Achilles, Bedfordview, 2007, ZA;
Other;
Abstract
A tool insert comprises a substrate () having a support surface and a support ring extending laterally from the support surface. The support ring is sized to define a recess () within the confines thereof and a shelf about the periphery thereof. A layer () of ultra-hard abrasive material is located within the recess and bonded to the substrate and the support ring (), and presents a primary cutting edge () for the tool insert. A protective layer () is bonded to the shelf about the support ring so as to protect the primary cutting edge. The protective layer provides a secondary cutting edge () for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling through a first substance but to expose the primary cutting edge upon encountering a second substance.